dt-bindings: rtc: pcf2127: remove pca/pcf2129 from trivial RTC devices list

pca/pcf2129 devices can also have the 'reset-source' property, so
remove them from the trivial RTC devices list.

Signed-off-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Reviewed-by: Bruno Thomsen <bruno.thomsen@gmail.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20221220152237.1125178-1-hugo@hugovil.com


Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>